Armature for electrical machines.



No. 805,547. PATENTED NOV. 28, 1905. W. T. HENSLEY.

ARMATURE FOR ELECTRICAL MACHINES.

APPLICATION IIL D MAR. 25. 1905.

&3

Q/vibvmoeo 51 221 UNITED STATES PalENT OFFICE.

ARIVIATURE FOR ELECTRICAL MACHINES.

Specification of Letters Fatent.

Patented Nov. 28, 1905.

Application filed March 25, 1905. Serial No. 252,057.

To all whont it may concern.-

Be it known that I, WILLIAM T. HENSLEY, a citizen of the United States,residing at Boundbrook, in the county of Somerset and State of NewJersey. have invented new and useful Improvements in Armatures forElectrical Machines, of which the following is a specification.

This invention relates to armatures for electrical machines; and itconsists in certain improvements in the construction thereof, as will behereinafter fully described, and pointed out in the claims.

The principal object of the invention is to afford a satisfactory meansof ventilating the armature-core.

The invention is illustrated in the accompanying drawings, as follows:

Figure 1 shows a section on the line 1 1 in Figs. 2 and 4:; Fig. 2, aplan view of a segment of the armature; Fig. 3, a plan view of one ofthe spacing-pieces used in the construction of the armature, the samebeing enlarged; Fig. I, a section on the line i t in Fig. 1.

The armature comprises the laminae or disks A. These disks are formedwith the teeth a in their periphery, and the armature-coils D arearranged in the spaces between these teeth. This is a commonconstruction.

Heretofore spaces have been provided for ventilating purposes byseparating two of the disks sufficiently to make an air-space. Differentmeans have been employed for holding the disks adjacent to theair-spaces apart. In most of them the spacing devices are such as tointerfere with the free flow of air or lack efficiency in some otherrespect.

I accomplish the holding of the disks apart by a spacing-piece G, whichis laid on the armature-coil and spans the air-space E. It is providedwith the shoulders 0, which engage the adjacent teeth a. Thespacing-piece is preferably formed of fiber or some other nonconducti'ngmaterial and is held in position by the band-wires D.

It will he noted that the air-spaces e between the coils B areunobstructed. The width of the shoulders 0 is preferably such that theavailable air-space between the pieces U is equal to the availableair-spaces between the edges of the armature-coils toward the center.

hat I claim as new is- 1. In an armature, the combination of thearmature-disks having teeth between which the armature-coils arearranged; said coils; and the spacing-pieces arranged along the coilsand having shoulders engaging the teeth, the shoulders being of lesswidth than the width of the teeth on the disk and formingventilatingspaces between said spacing-pieces.

2. In an armature, the combination of the armature-disks having teethbetween which the armature-coils are arranged; said coils; and thespacing-pieces arranged along the coils and having shoulders engagingthe teeth,the shoulders being of less width than the width of the teethon the disk and forming ventilatingspaces between said spacing-piecesequal to the spaces between the inner edges of the armature-coils.

3. In an armature, the combination of the armature-disks having teethbetween which the armature-coils are arranged; said coils; and thespacing-pieces arranged along the coils and having shoulders engagingthe teeth, the shoulders being of less width than the width of the teethon the disk and forming ventilatingspaces between said spacing-pieces;and the wrapping D extending around the armature and securing thespacing-pieces in place.

In testimony whereof I have hereunto set my hand in the presence of twosubscribing witnesses.

\VILLIAM T. I-IENSLEY.

Witnesses:

A. K. SMITH, ROBT. T. BRAMPTON.

